Improvement in saw-sets



uA. B. 4SMITH @L S. SBRN.

Saw-Sets.

N0. 136,777, k l l `Patented M`aruch'nlv,1873.

` I y 6;@ y

made of cast metal.

UNITED STATES AUGUSTUS B. SMITH, OF GHAMBERSBURG, PENNSYLVANIA, AND SAMUEL OSBORN, OF TRENTON, NEW JERSEY.

IMPROVEMENT IN SAW-SETS.V

I Specification forming partof Letters Patent No. 136,777, dated March 11, 1873.

To all whom it may concern:

Be it known that we, AUGUSTUS B. SMITH,

of Chambersburg, Franklin county, Pennsylvania, and SAMUEL OsEoRN, of Trenton, in the county of Mercer and State ot New Jersey, have invented a new and valuable Improvement in Saw-Sets; and we do hereby decla-re that the following is a full, clear, and eX- act description of the construction and operation of the same,reference beinghad to the annexed drawing making a part of this speciiication and to the letters and figures of reference marked thereon.

Figure l of the drawing is a sideelevation of our improved saw-set. Fig. 2 is a front elevation of the plunger. Fig. 3 is a perspective of the gage.

Our invention has relation to saw-sets 5A and the novelty consists in the construction and combination of parts hereinafter more fully described and claimed.

In the drawing, A represents the frame, We have shown it with a squared lower section, by which it may be. secured in a vise; or it may be made with a tapped screw-hole or other device for securing it to a bench. The frame is recessed at a to receive a die, B, which is made of steel, and formed with an upper horizontal and beveled surface, as plainly shown in the drawing.V

This die tits snugly in the recess, and is held firmly in place between the arms c of the gage C, a detached view of which is shown in Fig. 3. The gage is secured in position to. the frame by means of screws c.

When it is desired to adjust this gage so as to regulate the distancewhich the saw shall be pushed in upon the die, according to the ineness or coarseness of the teeth, the screws c are loosened and the gage turn ed as required. When the required adjustment is effected the screws are tightened, retaining the gage in place. D is the plunger, which is made of steel, and moves in a suitable hole in the frame A. The end of this plunger is beveled, as shown, to conform to the bevel of the die, and is of the shape shown in Figs. l and 2. To prevent the plunger from turning, we make vit with a flattened surface, as shown at "d, against which works the screw a2. The plunger is provided with a spring, d1, which is prevented from leaving its place by the pin cl2. The object of this spring is toraise the plunger automatically.

The operation of this device is as follows: The gage being properly adjusted, as already mentioned, the saw is placed upon the die, so that the iirst tooth will be directly under the plunger, which is brought down by a blow from a hammer. The same process is repeated with every 'alternate tooth; and then the saw is turned over, and the teeth which incline in an opposite direction are adjusted in a similar manner, an operation which can be performed by an unskilled hand.

.The surface of 1the die is formed as shown so as to give a horizontal surface at the front, on which the saw rests.

If vthe bevel extended from the front, itl

by Letters Patent, is-

The construction and combination, jointly, of the stand A, die B, gage C, and plunger D, substantially as described.

In testimony that we claim the above we have hereunto Asubscribed our names in the presence of two witnesses.

AUGUSTUS B. SMITH.

Witnesses: SAMUEL OSBORN.

JAMES WOLFENDEN, JAMES NUGENT.

PATENT OEErcE. 

